Institute of Garden Design
- Home-study course in garden and landscape design, offered in US and UK English versions.
- http://www.inst.org/gd/

The New York Botanical Garden: Continuing Education
- Offers classes about plants, gardening, commercial horticulture and landscape design.
- http://www.nybg.org/edu/cont_ed_cat.php

The English Gardening School
- Short courses, diploma programs, and distance learning opportunities at the Chelsea Physic Garden in the UK. Garden design and care, botanical painting, and creative workshops.
- http://www.englishgardeningschool.co.uk/